Exterior shell of a truck hood



FIG. 1 is a top perspective view of an exterior shell of a truck hood showing our new design, it being understood that the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is an enlarged top perspective view thereof;

FIG. 3 is a greatly enlarged front elevation view thereof;

FIG. 4 is a greatly enlarged side elevation view of one side thereof;

FIG. 5 is a greatly enlarged top plan view thereof; and,

FIG. 6 is a greatly enlarged side elevation view of the opposite side thereof. 

The ornamental design for an exterior shell of a truck hood, as shown and described. 